Retirement tax questions

I have two Support Numbers [phone number removed] (reported as closed BUT my question/problem was not solved and I could not  find no way to report that the case should not be closed so I called back and got the second case number) and [phone number removed] which disconnected as I was waiting for a resolution as the support person had me on hold as she checked with other sources..  Both calls on Saturday 2/19/2022.  The error I have and need to have resolved is the entry on Form 2210A1 Line 27(a) is correct BUT is not the entry on Form 2210 Line 10(a).  All instruction say the entry on Form 2210 Line10(a) should be the number on Form 2210A1 Line 27(a) but, at least in my case, the number is not the same but the sum of the number in columns (a) and (b) of Line 27 on Form 2210A1.  Results in a calculation of an underpayment of an estimated tax payment for period ending 3/31/2021 which is incorrect because the requirement payment is the sum of payments due for the first two periods ending on 3/31 and 5/31/2021